Product name：FB710 type electron charge-mass ratio tester (three-dimensional demonstration instrument of electronic deflection experiment)

Product Details

☆Helmholtz coils: inner diameter: Φ300mm; outer diameter: Φ320mm; effective radius:R=58mm, turns per soil: N=130T;
☆Accelerating voltage: 0-250V, exciting current:I=0-3.5A digital display continuously adjustable;
☆To measure curvature radius of electron track.

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Product name：FB710 type electron charge-mass ratio tester (three-dimensional demonstration instrument of electronic deflection experiment)